b'HRT-556DUAL-LOK Minimalist Brake (Included)MSRP: $89.95LENGTH.5.9 DB REDUCT.34.2dB 5.56mmWEIGHT.14.4oz MATERIAL.H900 & Cerakoted 17-4SS & 718 InconelDIAMETER1.5 MSRP$995CALIBER.5.56mm RATED FOR.Full Auto, no barrel restrictions'